WO2006013888A1 - 三フッ化窒素ガス発生用炭素電極 - Google Patents
三フッ化窒素ガス発生用炭素電極 Download PDFInfo
- Publication number
- WO2006013888A1 WO2006013888A1 PCT/JP2005/014197 JP2005014197W WO2006013888A1 WO 2006013888 A1 WO2006013888 A1 WO 2006013888A1 JP 2005014197 W JP2005014197 W JP 2005014197W WO 2006013888 A1 WO2006013888 A1 WO 2006013888A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- carbon electrode
- fluoride
- electrode
- nitrogen trifluoride
- trifluoride gas
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
- C25B11/04—Electrodes; Manufacture thereof not otherwise provided for characterised by the material
- C25B11/042—Electrodes formed of a single material
- C25B11/043—Carbon, e.g. diamond or graphene
- C25B11/044—Impregnation of carbon
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B21/00—Nitrogen; Compounds thereof
- C01B21/082—Compounds containing nitrogen and non-metals and optionally metals
- C01B21/083—Compounds containing nitrogen and non-metals and optionally metals containing one or more halogen atoms
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/24—Halogens or compounds thereof
- C25B1/245—Fluorine; Compounds thereof
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
- C25B11/02—Electrodes; Manufacture thereof not otherwise provided for characterised by shape or form
- C25B11/03—Electrodes; Manufacture thereof not otherwise provided for characterised by shape or form perforated or foraminous
Definitions
- the present invention relates to nitrogen trifluoride gas (hereinafter referred to as NF).
- Patent Document 1 A carbon electrode for generating nitrogen trifluoride gas and a nitrogen trifluoride gas generator using the same are known.
- Patent Document 1 is a carbon electrode for generating fluorine gas or nitrogen trifluoride gas comprising a carbonaceous material, lithium fluoride, and a metal fluoride having a melting point equal to or higher than the firing temperature of the carbonaceous material.
- a carbon electrode for generating fluorine gas or nitrogen trifluoride gas wherein the content of the two-component metal fluoride comprising the lithium fluoride and the metal fluoride is 0.1 to 5% by mass.
- Patent Document 2 proposes a method for suppressing the polarization of a carbon electrode by impregnating the carbon electrode with a metal fluoride such as lithium fluoride, sodium fluoride, aluminum fluoride, or magnesium fluoride. .
- Patent Document 1 Japanese Unexamined Patent Publication No. 2001-295086
- Patent Document 2 JP-A-5-5194
- the metal fluoride in Patent Document 1 is composed of a eutectic system of lithium fluoride and calcium fluoride.
- This eutectic metal fluoride includes a step of melting lithium fluoride and calcium fluoride at a temperature higher than their melting points, and further crushing the produced eutectic metal fluoride and a carbon material. A process of mixing and firing is required, which is complicated and expensive.
- the electrolytic bath for NH F-HF is used. This electrolytic bath has low viscosity, and further
- the first stage compound is a material in which an inter force runt is inserted in each layer of the black lead layer, and the material swells greatly, resulting in the destruction of the structure.
- a carbon electrode having a relatively high mechanical strength with few pores in the structure is manufactured by simply mixing a specific metal fluoride with a carbon material and firing it.
- the purpose is to create a carbon electrode that shows life.
- the present invention further examines the type of metal fluoride contained in the carbon electrode and the content thereof, and thus the above-described problem, that is, the electrolytic bath inside the carbon electrode pores. Solve the problems of preventing (liquid) intrusion and suppressing polarization action A carbon electrode that can be obtained can be obtained, and the present invention has been completed.
- the gist of the present invention is a carbon electrode having a fine texture with an average pore diameter of 0.5 m or less. If the average pore diameter is larger than 0.5 m, the electrolytic bath may enter the carbon electrode and cause the electrode to collapse.
- the average pore diameter of the carbon electrode was measured by mercury porosimetry, and the pore radius showing a value corresponding to half of the cumulative pore volume was taken as the average pore diameter.
- the carbon electrode for generating nitrogen trifluoride gas according to the present invention comprises at least one selected from a carbonaceous material, magnesium fluoride having a melting point equal to or higher than the firing temperature of the carbonaceous material, and aluminum fluoride. There will be power.
- magnesium fluoride and aluminum fluoride are contained up to the center of the carbon electrode, when viewed microscopically, magnesium fluoride and aluminum fluoride are trapped between the black lead layers that make up the carbon electrode.
- An intercalation compound can be formed to suppress the polarization action. This is also economically advantageous in that it can replace expensive lithium fluoride that has been used exclusively as a polarization inhibitor. It is also possible to use a mixture of magnesium fluoride and aluminum fluoride.
- metal fluoride (MF) such as magnesium fluoride or aluminum fluoride is present on the electrode surface, the metal fluoride is a metal fluoride in a higher-order oxidation state as shown in the following formula (3). This high-order oxidation state metal fluoride forms an active complex of the following formula (4), and further, the active complex becomes a fluorine-graphite intercalation compound, and the metal fluoride returns to its original form catalytically.
- the present invention uses NH F—KF—HF system for the electrolytic bath. Potassium fluoride N HF-By adding to the HF electrolytic bath, the viscosity of the electrolytic bath is increased and carbon in the electrolytic bath is increased.
- the HF activity in the carbon pores can be reduced, and the collapse of the electrode during electrolysis can be suppressed.
- the content of at least one selected from the internal forces of magnesium fluoride and aluminum fluoride is 3 to 10 wt%.
- the content of at least one selected from the internal forces of magnesium fluoride and aluminum fluoride is lower than 3 wt%, the effect of the metal fluoride as a catalyst for the generation of fluorine-graphite intercalation compounds is sufficiently exerted.
- the strength of the electrode itself is not preferable.
- an electrode since there is no step of preparing a eutectic metal fluoride, an electrode can be produced very easily and inexpensively.
- the physical strength of the electrode was improved compared to the carbon electrode containing calcium fluoride, and it was possible to further extend the life of the electrode and continue electrolysis for a long time.
- Even in the one-way system there is a catalytic action for the generation of a fluorine-carbon intercalation compound having ionic bonds and semi-covalent CF bonds, and the generation of the anodic effect can be suppressed.
- this reaction proceeds moderately, it contributes to an increase in the polarity of the electrode material surface, improves the wettability between the electrolytic bath and the electrode, and exhibits the effect of suppressing the polarization of the electrode.
- the first stage compound when the first stage compound is formed, the material swells and collapses.
- the addition of A1F and MgF which have a milder catalytic ability for the formation reaction of fluorine-graphite intercalation compounds, enables the third stage
- MgF Magnesium fluoride
- A1F aluminum fluoride
- At least one of them is uniformly mixed in a predetermined amount.
- 3 to 10 wt% of the above metal fluoride or a mixture of metal fluorides is mixed with mesocarbon microbeads to form and calcined carbon compacts.
- This carbon molded body is subjected to CIP molding at a pressure of 80 to 100 MPa, fired at 800 to 1000 ° C., and processed into a predetermined shape.
- the electrode used in the present invention is not limited to the above manufacturing method.
- the carbon electrode according to the embodiment of the present invention is made of magnesium or aluminum fluoride that does not use lithium fluoride as a metal fluoride having a catalytic action for the formation of a carbon graphite intercalation compound. Addition to the electrode suppresses the generation of the anode effect. Further, since the strength of the electrode is larger than that of the carbon electrode containing lithium fluoride-calcium fluoride, the life of the electrode is prolonged.
- A1F with an average particle size of 10 m was added to mesocarbon microbeads with an average particle size of 15 ⁇ m, and mixed uniformly using a mixer. Then 9
- CIP molding Cold isostatic pressing (CIP molding) was performed with OMPa. After forming into a block shape, it was packed in a sagar and fired in a continuous furnace (900 ° C). This molded body was processed into a predetermined size to obtain a carbon electrode of Example 1. Further, except for adjustment of the type and addition rate of the metal fluoride, as in Example 1, the nitrogen trifluoride gases of Examples 2 to 7 and Comparative Examples 1 to 7 having the physical properties shown in Table 1 below were finally obtained. A carbon electrode for generation was produced. In Comparative Example 7, the molding pressure was 40 MPa in order to increase the average pore diameter.
- the carbon electrode of each example containing aluminum fluoride and magnesium fluoride having an average pore diameter of 0.5 ⁇ m or less shows the yield and polarization action of nitrogen trifluoride gas. It turns out that it does not occur. Moreover, it can be seen that the carbon electrode of each example has a much longer electrode life than the carbon electrode of each comparative example.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Inorganic Chemistry (AREA)
- Electrodes For Compound Or Non-Metal Manufacture (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Inert Electrodes (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/572,938 US7608235B2 (en) | 2004-08-05 | 2005-08-03 | Carbon electrode for generation of nitrogen trifluoride gas |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-229326 | 2004-08-05 | ||
JP2004229326A JP4339204B2 (ja) | 2004-08-05 | 2004-08-05 | 三フッ化窒素ガス発生用炭素電極 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006013888A1 true WO2006013888A1 (ja) | 2006-02-09 |
Family
ID=35787169
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/014197 WO2006013888A1 (ja) | 2004-08-05 | 2005-08-03 | 三フッ化窒素ガス発生用炭素電極 |
Country Status (6)
Country | Link |
---|---|
US (1) | US7608235B2 (ja) |
JP (1) | JP4339204B2 (ja) |
KR (1) | KR101018946B1 (ja) |
CN (1) | CN101001981A (ja) |
TW (1) | TW200613583A (ja) |
WO (1) | WO2006013888A1 (ja) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101720367B (zh) | 2007-04-23 | 2012-02-08 | 三井化学株式会社 | 气体生成装置以及气体生成用碳电极 |
CN102560530A (zh) * | 2012-03-15 | 2012-07-11 | 中南大学 | 纳米镍质点增强的非石墨化导电碳阳极材料及其制备方法 |
CN106222688B (zh) * | 2016-07-19 | 2018-01-09 | 浙江博瑞电子科技有限公司 | 一种氟化氢铵电解制取三氟化氮的方法 |
CN114213128A (zh) * | 2021-12-28 | 2022-03-22 | 成都炭素有限责任公司 | 一种等静压成型制氟碳阳极板的制备方法 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5623285A (en) * | 1979-08-02 | 1981-03-05 | Nobuatsu Watanabe | Production of fluorine |
JPH0247297A (ja) * | 1988-08-05 | 1990-02-16 | Nobuatsu Watanabe | 低分極性炭素電極 |
JPH03232988A (ja) * | 1990-02-06 | 1991-10-16 | Toyo Tanso Kk | 炭素電極ならびにそれを用いるhf含有溶融塩の電解方法及び装置 |
JP2001295086A (ja) * | 2000-04-07 | 2001-10-26 | Toyo Tanso Kk | フッ素ガスまたは三フッ化窒素ガス発生用炭素電極及びそれを用いたフッ素ガスまたは三フッ化窒素ガス発生装置 |
-
2004
- 2004-08-05 JP JP2004229326A patent/JP4339204B2/ja active Active
-
2005
- 2005-08-03 WO PCT/JP2005/014197 patent/WO2006013888A1/ja active Application Filing
- 2005-08-03 CN CNA2005800265355A patent/CN101001981A/zh active Pending
- 2005-08-03 US US11/572,938 patent/US7608235B2/en active Active
- 2005-08-03 KR KR1020077002821A patent/KR101018946B1/ko active IP Right Grant
- 2005-08-08 TW TW094126720A patent/TW200613583A/zh unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5623285A (en) * | 1979-08-02 | 1981-03-05 | Nobuatsu Watanabe | Production of fluorine |
JPH0247297A (ja) * | 1988-08-05 | 1990-02-16 | Nobuatsu Watanabe | 低分極性炭素電極 |
JPH03232988A (ja) * | 1990-02-06 | 1991-10-16 | Toyo Tanso Kk | 炭素電極ならびにそれを用いるhf含有溶融塩の電解方法及び装置 |
JPH055194A (ja) * | 1990-02-06 | 1993-01-14 | Toyo Tanso Kk | 炭素電極ならびにそれを用いるhf含有溶融塩の電解方法及び装置 |
JP2001295086A (ja) * | 2000-04-07 | 2001-10-26 | Toyo Tanso Kk | フッ素ガスまたは三フッ化窒素ガス発生用炭素電極及びそれを用いたフッ素ガスまたは三フッ化窒素ガス発生装置 |
Also Published As
Publication number | Publication date |
---|---|
US20070199828A1 (en) | 2007-08-30 |
KR101018946B1 (ko) | 2011-03-07 |
JP4339204B2 (ja) | 2009-10-07 |
JP2006045625A (ja) | 2006-02-16 |
TW200613583A (en) | 2006-05-01 |
TWI341877B (ja) | 2011-05-11 |
KR20070046100A (ko) | 2007-05-02 |
US7608235B2 (en) | 2009-10-27 |
CN101001981A (zh) | 2007-07-18 |
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